Harmony Blockchain Data Indexing API
Harmony Quick Facts
Harmony is an open and fast blockchain. The production mainnet supports 4 shards of 1000 nodes, capable of running Ethereum applications with 2-second transaction finality, and 1000 times lower fees than Ethereum. Harmony is your open platform for assets, collectibles, identity, governance. The secure bridges offer cross-chain asset transfers with Ethereum, Binance and 3 other chains. Harmony’s Effective Proof-of-Stake (EPoS) reduces centralization while supporting stake delegation, reward compounding and double-sign slashing. Harmony aims to build an open network of nodes operated and governed by a large community. This node community is called Pangaea.
- Mainnet
- Harmony Testnet
Chain name | harmony-mainnet |
Chain ID | 1666600000 |
Block explorer | https://explorer.harmony.one/ |
Blocktime | 2 seconds |
Historical balances | ✅ |
NFT assets and metadata | ✅ |
Premium Endpoints | |
Premium Balances | ❌ |
Premium Transactions | ❌ |
Premium Log Events | ❌ |
Query via SQL on Increment | ✅ |
Network Status
- | - | - | |||
---|---|---|---|---|---|
Monthly Active Wallets Unique wallets who transact on a monthly basis. | - | - | - | ||
Transactions Unique transactions on a monthly basis. | - | - | - | ||
Active Tokens Unique tokens active on a monthly basis. | - | - | - | ||
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Code Samples
- Token Balances
- Transactions
- Portfolio
- Get a block
Get token balances for address
/v1/{chainName}/address/{walletAddress}/balances_v2/
Commonly used to fetch the native, fungible (ERC20), and non-fungible (ERC721 & ERC1155) tokens held by an address. Response includes spot prices and other metadata.
Each API Call Currently Costs: 1.00 Credits.
- shell
- JavaScript
- ruby
- python
curl -X GET https://api.covalenthq.com/v1/{chainName}/address/{walletAddress}/balances_v2/ \ -H 'Content-Type: application/json' \ -u YOUR_API_KEY: \ # The colon prevents curl from asking for a password